Stall cock



L. DINESEN April 26, 1949.

STALL COCK Filed March 26, 1947 Patented Apr. 26, 1949 UNITED STATES PATENT OFFICE STALL COCK Laurits Dinesen, Minneapolis, Minn., assignor to Perfection Manufacturing Corporation, Minneapolis, Minn., a corporation of Minnesota.

Application March 26, 1947, Serial No. 737,250

2 Claims.

My invention relates generally to valves and more specifically to valves for use in vacuum lines or between points oi diferential air pressure.

My invention is particularly adapted for use in large vacuum pipe installations where it is desired to periodically tap into the line at various points. An example of this type of setup is a large cattle barn having vacuum tubing extending irom a central source of vacuum into or adjacent to the individual stalls thereof for the purpose of running milking machines which are taken from one stall to another.

The primary object of my invention is the provision of a stall cock for the above uses, the valve of which will positively close under the action of gravity and differential in air pressure when not in use, but which valve will be automatically unseated by the insertion of a branch line into the valve body, so as to automatically place saidbranch line also under partial vacuum.

Another object of my invention is the provision of a stall cock, which can be manufactured at a minimum of cost, which is positive in its action, durable in use, easy to operate, and compact in size.

The above and still further objects of my invention will become apparent from the following detailed specification', appended claims, and attached drawings.

Referring to the drawings wherein like characters indica-te like parts throughout the several views:

Fig. l is a view in side elevation, showing my stall cock connected to main and branch vacuum lines, some parts being broken away;

Fig. 2 is a front elevation of the parts shown in Fig. l;

3 is a view corresponding to Fig. 1, but showing some parts broken away and some parts shown in section; and

Fig. fi is a View corresponding to Fig. 3, but having some parts removed and illustrating a different position of some of the parts.

Referring with greater particularity to the drawings, my novel stall cock comprises a body member I having a valve chamber 2 which, as shown, is cylindrical in form. Valve chamber 2 is in communication with a bore 3 in a reduced axial extension 4 thereof and has communication therethrough with a source of partial vacuum, not shown, through a conduit 5 having threaded engagement with the reduced portion 4.

Upstanding from the bottom of the valve chamber 2 is an annular valve seat 6 concentric with the bore 3. A valve element, identified in its entirety by the numeral 1, is loosely contained within the chamber 2 and is biased, under the action of gravity, toward the valve seat 6. The valve l is made up of upper and lower axiallyspaced cylindrical flanges 8 and 9 respectively connected by a diainetrically reduced axially-extending stem iii. The flanges 8 and 9 and the connecting stem Ill may be formed in any suitable manner, but are preferably cast in one piece. On its under side, the iiange 9 is formed with an axially-depending stein II, which is undercut, as indicated at I2, to receive and retain a gasket i3. The gasket I3 may be made of rubber or any suitable resilient sealing material. The flange 9 is further provided with circumferentially-spaced notches I4 to permit communication between the chamber 2 above the ange 9 and the bore 3 when the valve 7 is opened, as indicated in Fig. 3.

The flanges 8 and 9 of the valve 'I are of a diameter, with respect to the valve chamber 2, to permit free reciprocal movements of the valve l in said chamber 2, while also acting as guide to prevent tilting, thus assuring constant alignment of the sealing gasket I3 with the valve seat 6. The flange 8 of the valve 1 is provided with an opstanding handle element I5 to facilitate removal of the valve 'I from the chamber 2. The upper end of the body I is threaded to receive a gasket-equipped closure cap I6.

A tubular extension l? extends downwardly at approximately a 45 degree angle from the intermediate portion of the side of the body I and is provided with an axial bore I8 which communicates with the chamber '2 adjacent one side thereof. A tubular conduit terminal member i9 is provided with a circumferentially-extended shoulder-forming flange 2!! intermediate its ends against the outer side of which is positioned a sealing ring 2|. The axially-extended free end 22 of member I9 is of a diameter to be freely received within the bore I8 of the tubular extension il, and the free end 22 is of a length to engage the underside of cylindrical ange 8 and lift the valve 'I, in the chamber 2, from its seat d when the sealing ring 2l is in contact with the outer end of the tubular extension I1.

The numeral 23 indicates the end portion of a branch line conduit which is normally connected to a milker or the like, not shown.

It should be obvious from the above that, prior to the insertion of the tubular conduit terminal member I9 into the bore IB, the difierential in air pressure within the conduit 5 and the chamber 2, and the action of gravity, will seat the valve 1 against the valve seat B through the sealing gasket I3, to maintain the desired amount of vacuum within the conduit 5. Upon insertion of the `conduit terminal I9 into the bore I8, the extreme end of the extended prtion 22 will engage the under side of the cylindrical ange B and lift the "valve 1 away from engagement with th'e 'valve seat 6, 'whereby to introduce the conduit 23 and a milker associated therewith to the partial vacuum of conduit 5. The differential in air pressure between that 'of the conduit 5 and that of the conduit 23 will tend to retain the conduit terminal 4-wit'flnn tthe tubular extension I'l with 'the l'sealingring *'2I( in sealing engagement with the end of the tubular extension l1.

As soon as the free end portion 22 is pulled away from engagement with the cylindrical flange 8, the valve 1 will again, under the action iof gravity fand vdifferen't'ifal fin *air pressure, vdrop into engagement with the vaiv'e sea't E.

VWhile -I fha've "disclosed 'a commercial Aadapta- "t'i'on lof my invention, it should *be obvious that vl`the same-is .capableof inodication Without departure 'from the 'scopeof the appended claims.

`1. A valve irreelianlislmcbmprising a kbody member having "a verticallyedi'spos'ed cylindrical valve `chamber therein, `an axially aligned bore comfm-unicatifng "-w'tlifsaid v'alve chamber and 'adapted to 4be connected with a vacuum source, a valve seat at the junctrefof said "bore and chamber, 'a valv'e element -loosely mounted within said tchambe'r for verti'CalMi'n'i/ements to `and from searing engagement with @said Jvseat f'and 'normally seated thereon under "vdiierential air pressure, s'ai'd valve l'elen'rent comprising a base 'member having a maximum width only slightly less :than the diameter o'f 'said chamber, an 'axially spaced head hav-ing 'a -maiimum width yonly yslightly less fha-'n the diameter 'of said"valve chamber, anda reduced neck l'portion 'ieonnectin'g v'said base member llandlread, said body member also being `'provided with aftubularfex'tensien ithe bore o'f which communicates tangenftially with said valve-cnamb'er intermediate the tbase `member and head of said valve element, and an elongated tubular conduit terminal insertable into said last-mentioned bore for engagement of the free end thereof with the head of the valve element to simultaneously raise said valve element from sealing engagement with said valve `seat and to impart a partial rotary movement thereto. y

2. Avait/ emechanismhortlpiiisinga body member, 'a vertlcally'ispose *Valve chamber in said body portion, a bore in the base of said body 'member coaxial With said valve chamber and adapted to be connected to a vacuum source, a valve seat at the juncture of said bore and chamber, a valve loosely *contained Within said cham- .'ber "for vertical 'and limited horizontal move- Vnen't's 'to land "frinsealing engagement with said "valve lseat fand Yn'xcrmally -seated on said valve seat under differential vair pressure, said valve having a maximum width only slightly less than the width of saidchanber whereby when said r`-valye 'tis moved -d'ciwnwardlyin said chamber the wallsbf 'said chamber will @guide 'said vali/e to lsealing engagement with` Seat, *said lbody also beingfp-rovi'ded with 'fa/second bore 'which comfmunicats with the 'valve hair'iber above the valve seat i4in a psitin ereby "an *axial pro'- j'ection Afof''saLidf-b'ore ``will i pt "said valve, and an elongated tubularicondii terminal '--insertable Iin is aidlate'mentined bo're Ilfr engagement With-- 1in said ch'a'n'fiber J the -fre'e end thereof ywith isaid vailve 1to raise l'e isame `ffrom its s'eat, said valvey chamber bif'g cylind "al and said valve including 'fa head portion providing a should-'er for engagent-erft the -tubular A'corniuit terminal.

Number y Name Date '200,944 LSi'nitll IMal'. f5, .187 8 A2,251,071 VVscott V t July 29, 1941 2,271,229 v,Itru'lt'ert Mar. "24, 194,2 2,451,456 RaWsI`1' Oct. 12, 1948 

